How to Enable TLS 1.2 for My .NET Web Service?

Ensuring Your .NET Web Service Supports TLS 1.2

To connect to web services requiring TLS 1.2, your .NET application pool needs proper configuration. Here's how to achieve TLS 1.2 compliance:

Methods:

1. Upgrade to .NET 4.6 or Later: .NET Framework 4.6 and later versions support TLS 1.2 by default. If your application pool is using an older version (like .NET 4.0), upgrading is the simplest and recommended solution.

2. Direct Registry Modification (Caution Advised): Manually enabling TLS 1.2 in the Windows registry is possible, but this method might disable SSL 3.0, TLS 1.0, and TLS 1.1, potentially impacting other applications. Proceed with caution and only if upgrading .NET is not feasible.

3. Web.config File Adjustment: Modify your web.config file to force IIS to utilize .NET 4.6 (or later) for your web service. Add this XML code within the <system.web> section of your web.config:

<code class="language-xml"><system.web>
  <compilation targetFramework="4.6" />
  <httpRuntime targetFramework="4.6" />
</system.web></code>

After implementing these changes, your .NET web service should utilize TLS 1.2 by default, ensuring secure connections.

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